Polyester embroidery thread is the most popular thread used for home and
commercial machine embroidery, because it's is strong, colorfast, durable in
laundry and wearing, practically NON-shrinking and can be purchased in huge
variety of colors. When comparing each of these five properties of polyester
embroidery thread to parallel qualities of rayon and cotton, poly wins every
time. It breaks less than the other two, doesn't fray, doesn't bleed, keeps it's
color in heavy laundry, and can perform great without breaking even on very high
embroidery speeds.Read more...